Statistics And Data Plots - Texas Instruments TI-89 Titanium Short User Manual

Steps and keystrokes
5. Clear the contents of the variable.
Simply clearing the data does not convert
the data variable back into a list variable.
Press , 8 ¸
Note: If you don't need to save the current variable, use it as a
scratchpad. The next time you need a variable for temporary data, clear
the current variable and re-use it. This lets you enter temporary data
without creating a new variable each time, which uses up memory.

Statistics and Data Plots

Based on a sample of seven cities, enter data that relates population to
the number of buildings with more than 12 stories. Using Median-
Median and linear regression calculations, find and plot equations to fit
the data. For each regression equation, predict how many buildings of
more than 12 stories you would expect in a city of 300,000 people.
Steps and keystrokes
1. Display the
mode, select
Press 3 B 1 ¸
2. Use•O to display the
Create a new data variable named BUILD.
Press 3 D D BUILD ¸ ¸
Previews
dialog box. For
MODE
.
FUNCTION
Data/Matrix Editor
Display
Display
Graph
.
71